fix(deps): update module sigs.k8s.io/controller-runtime to v0.21.0#64

guewa merged 2 commits intomainopenmcp-project/mcp-operator:mainfrom

renovate/sigs.k8s.io-controller-runtime-0.xopenmcp-project/mcp-operator:renovate/sigs.k8s.io-controller-runtime-0.xCopy head branch name to clipboard